Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung tuan » trung thanh, trung tam, tran tuan
doi chieu » doc hieu, doi chi, mot chieu
tuan dong » tuan duong, quan dong, luan dong
ho chieu » theo chieu, hoc thieu, mot chieu
cong tac » cong ty
tran tan » tran tuan, tran van, tran thanh

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) OR (doi chieu)) sach - thanh trung tuan dong ((cong san) or (cong tac)) tran tan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) sach - thanh trung tuan dong ((cong san) OR (cong tac)) tran tan.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (doi chieu)) sach - thanh trung tuan dong ((cong san) or (cong tac)) tran tan".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (doi chieu)) sach - thanh trung tuan dong ((cong san) or (cong tac)) tran tan*.